Automation System
A disadvantage of Numerical Control (NC) is:

the computer is not reliable
the tape and tape reader are not reliable
one operator is needed for each machine.
the machine tool can easily overheat
None of these

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Automation System
The computer graphics system called SKETCHPAD was demonstrated at

Massachusetts Institute of Technology in 1963
Cranfield Institute of Technology, London, 1962
Imperial college of Science and Technology, London, 1973
University of Aston, Birmingham, 1960
None of these

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